<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Isolated World</title>
    <script>
      window.hello = 'world'
      Array.prototype.push = 3
      Function.prototype.apply = true

      const opened = window.open()
      opened.close()

      window.postMessage({
        preloadProperty: typeof window.foo,
        pageProperty: typeof window.hello,
        typeofRequire: typeof require,
        typeofProcess: typeof process,
        typeofArrayPush: typeof Array.prototype.push,
        typeofFunctionApply: typeof Function.prototype.apply,
        typeofPreloadExecuteJavaScriptProperty: typeof window.preloadExecuteJavaScriptProperty,
        typeofOpenedWindow: typeof opened
      }, '*')
    </script>
  </head>
  <body>

  </body>
</html>
